My first experience with the behavior of forcefully tapping the bottom of a beer bottle to the top of another, creating a foamy overflow, was in the rowdy crew bar of the Queen Elizabeth 2 on which I served in the entertainment department in my much .... Physics Involved in Foaming of Beer Bottles Explained by ResearchersScience World Report The Physics of Beer TappingScience Daily (press release) Why Beer Foams Over When TappedGuardian Express Science 2.0 -French Tribune all 18 news articles »